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EPA 608 NEC 2023

EPA 608 Type 1 Exam Practice Test 2

Free EPA 608 Type I Exam Practice Test 2. 25 questions covering R-134a household use, phosgene from R-12/R-22, recovery equipment certification date, Type I charge limit, refrigerant mixing rules, sale restrictions, piercing valve removal, nitrogen purging, recovery start requirements, regulated refrigerants, SCBA for large releases, recovery equipment maintenance, DOT container standards, compressor burnout detection, MVAC exclusion from Type I, R-134a vs R-12 pressure comparison, filter dryer function, R-600a flammability, recovery cylinder fill verification, self-contained vs passive recovery, post-repair evacuation, de minimis graduated cylinder, Type I certification scope, refrigerant identification, and R-500 cylinder rules.

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The EPA 608 certification is required by law for any technician who purchases or handles refrigerants. It covers safe handling, leak detection, recovery, and environmental regulations.

Type I covers small appliances (≤5 lbs refrigerant), Type II covers high-pressure systems, Type III covers low-pressure systems, and Universal covers all three. Most HVAC technicians pursue Universal certification.

You must score at least 70% on each section of the exam. The Universal exam has four parts: core, Type I, Type II, and Type III.

Key facts for this test: R-12 and R-22 decompose to phosgene gas when they contact an open flame — phosgene is highly toxic. Recovery equipment manufactured after November 15, 1993 must be EPA-certified. Type I certification covers small appliances with a charge of 5 pounds or less. Refrigerants can NEVER be mixed in the same recovery cylinder — each refrigerant gets its own dedicated cylinder. MVAC-like systems (motor vehicle A/C) are NOT Type I appliances even if they hold under 5 lbs of refrigerant.

25

Questions

45 min

Time

70%

Pass

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EPA 608 Type 1 Exam Practice Test 2 — Question List

Question 1: In new household refrigeration which of the following refrigerants is most commonly used as a replacement for R12 refrigerant?

R-123
R-24
R-234
R-134a

Question 2: R12 and R22 refrigerants can decompose to ............... form at higher temperatures.

Hydrogen gas
Helium gas
Phosgene gas
Nitrogen gas

Question 3: The recovery equipment manufactured after ................ Must be certified by EPA laboratory to use for service or repair of small appliances.

July 12,1993
November 15,1993
June 15,1992
May 12, 1993

Question 4: For type 1 refrigeration appliance what is the the maximum allowable charge of refrigerant?

4 pounds
5 pounds
7 pounds
10 pounds

Question 5: Which of the following refrigerants can be mixed?

R-12 and R-134a
R-12 and R-500
R-22 and R-410A
Refrigerants can never be mixed

Question 6: The sale of refrigerant ...........

Banned
Limited to equipment owners
Allowed only if there is any proof of need
Restricted to EPA certified technicians.

Question 7: After completion of refrigerant repair, the solder-less piercing valves should be removed from refrigeration system because ............

There are two expensive
They tend to leak over time
They became loose and vibrate
Both en pensive and loose on system.

Question 8: When ever the pressurized nitrogen is used to blow debris out of the system ..............

only nitrogen vapor should be used
only liquid nitrogen should be used
Either liquid or vapor nitrogen can be used.
nitrogen vapor mixed with R-134 should be used

Question 9: The refrigerant recovery procedure should always be started after ......................

determining the type of refrigerant to be recovered
allowing system to be stabilized
moving the system to outdoor position
disconnecting the system from power source

Question 10: Under EPA section 608 which of the following refrigerants must be recovered currently from refrigeration equipment?

R-12
sulfur dioxide
methyl cloride
carbon monoxide

Question 11: Which of the following is perfect option in the event of large release of R-12 or R-22 in a contained are?

wearing safety googles and hand gloves
wearing a self-contained breathing apparatus (SCBA)
wearing dust masks to protect against harmful vapors
flushing nitrogen in the leaked area

Question 12: The following maintenance practice should be performed on recovery equipment as per EPA guidelines?

checking recovery device for refrigerant leaks
checking vacuum pump for any refrigerant leaks
checking the ampere current drawn by the recovery device
checking the correct functioning of recovery device

Question 13: Portable refillable refrigerant containers must met the following standard to be used to ship the recovered refrigerants.

Department of Transportation
ARI 740
Community Right-to-know act
Environmental agency

Question 14: In a refrigerant recovery or repair from a refrigeration system if a pungent odor is detected .......................

It is the smell of the leaking oil in the system
the refrigerant should not be recovered
it indicates the leakage of the refrigerant
a compressor burnout has likely occured

Question 15: Which of the following is not a Type I refrigerant appliance?

an MVAC like system that holds three pounds of R-12
A water cooler that holds 13 ounces of R-12
A food freezer that holds 44 ounces of R-22
A dehumidifier with seven ounces of R-500

Question 16: Compared to R-12, how does R-134a's operating pressure compare at the same temperature?

R-134a operates at much HIGHER pressure than R-12
R-134a operates at slightly LOWER pressure than R-12 at the same temperature
R-134a and R-12 operate at exactly the same pressure
Pressure comparisons between R-12 and R-134a are not relevant

Question 17: What is the purpose of the filter dryer (drier) installed in a small appliance such as a household refrigerator?

To separate oil from refrigerant and return it to the compressor
To remove moisture and solid contaminants from the refrigerant circuit
To control refrigerant flow into the evaporator
To store excess refrigerant when the system demand is low

Question 18: Some modern household refrigerators use R-600a (isobutane) as the refrigerant. What special precaution is required when working on these appliances?

R-600a has high toxicity — wear a respirator at all times
R-600a is flammable — no open flames, sparks, or ignition sources in the work area
R-600a is non-flammable and has no special handling requirements
R-600a must be recovered at very low temperatures only

Question 19: What is the correct method to determine how much refrigerant is already in a recovery cylinder before adding more?

Check the pressure gauge on the cylinder — higher pressure means more refrigerant
Weigh the cylinder on a scale and compare to the maximum allowed fill weight
Shake the cylinder to estimate how much refrigerant is inside
A recovery cylinder can never be overfilled — no check is needed

Question 20: A technician needs to recover refrigerant from a small appliance whose compressor has seized and will not operate. Can a self-contained recovery machine complete this recovery?

No — recovery is impossible without a working system compressor
Yes — a self-contained recovery machine has its own compressor and does not need the system compressor
No — the technician must replace the compressor before attempting recovery
Yes — but only if the technician also runs a vacuum pump simultaneously

Question 21: After recovering refrigerant from a small appliance and completing the repair, what must be done BEFORE recharging the system with refrigerant?

Charge immediately with the correct amount of refrigerant
Evacuate the system to a deep vacuum to remove air and moisture
Flush the system with nitrogen, then charge with refrigerant
Recharge with double the normal amount of refrigerant to compensate for any remaining air

Question 22: Under EPA Section 608, what is the term for the small, unavoidable releases of refrigerant that occur during normal service operations (such as venting the vapor above refrigerant in a graduated charging cylinder)?

A violation requiring immediate reporting to the EPA
De minimis release — a small unavoidable release exempt from the venting prohibition
A deliberate vent that must be recorded in the service log
There is no exemption — all refrigerant releases are violations

Question 23: A technician holds only a Type I EPA Section 608 certification. Which of the following equipment is this technician authorized to service?

All types of refrigeration equipment including large commercial systems
Small appliances with 5 pounds or less of refrigerant (Type I only)
Type I and Type II equipment, but not Type III
Type I certification is not needed — anyone can service small appliances

Question 24: Why must a technician identify the type of refrigerant in a small appliance BEFORE starting the recovery process?

Refrigerant type does not matter for small appliance recovery
To use the correct recovery cylinder and prevent cross-contamination
Only to satisfy the curiosity of the technician
Only if the appliance is older than 10 years

Question 25: A technician has recovered R-500 from a small appliance. The technician has an empty recovery cylinder that was previously used for R-12. Can the recovered R-500 be put into this R-12 cylinder?

Yes — R-500 contains R-12 so they can share the same cylinder
No — R-500 must go in its own dedicated cylinder and must never be mixed with R-12
Yes — mixing is allowed as long as the cylinder is less than 50% full
It depends on whether the cylinder has a pressure relief valve

Study Tip: The EPA 608 exam is closed book. Memorize: recovery is required before opening any refrigerant system. Venting refrigerant is illegal. Know the ODP and GWP values for R-22, R-410A, R-134a, R-32, and R-454B.

EXAM CARD EPA 608

Questions25

Time limit45 min

Pass score70%

RegulationEPA Section 608

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: EPA Section 608 (40 CFR Part 82)